Given the following reaction
21.0,
2 h,0 +0,
how many moles of 11.will be produced from 26.0 g of h, o,?
moles (round to three significant hgures)

Explanation:58.5g NaCl(mol/58.5g)(6.02 x 1023/mol) = 6.02 x 1023 Na

+

Cl21 pre-1982 pennies (after 1982 pennies are mostly zinc with copper coating)

63.5g Cu( mol/ 63.5g)(6.02 x 1023/mol) = 6.02 x 1023 Cu

19.0g Al (mol/27.0g)(6.02 x 1023/mol) = 4.24 x 1023 Al

Demo of Oxidation Reactions

Flash bulb

2Mg + O2  2MgO fast

2Cn + O2  2CnO slow

Copper Oxide Penny

2Cu + O2  2CuO

Intro to Chapter

Stoichiometry is the process of making calculations based on formulas and balanced equations

Since Modern Chemistry involves:

Symbolic representation of models

Mathematics

Quantitative measurements

You are going to be using lots of symbols and equations and doing lots of calculations

The fundamental Question –

How do you go from combining ratio of atoms (like H2O) to something you can measure in lab?

OR How do you go between number of ato